基于多边形孔隙结构模型的砂岩储层总孔隙度预测方法  

A Porosity Prediction Method for Sandstone Reservoir Based on Polygonal Pore Structure Model

作　　者：张秉铭[1] 刘致水 刘俊州[3] 折向毅 陈雪薇 ZHANG Bingming;LIU Zhishui;LIU Junzhou;ZHE Xiangyi;CHEN Xuewei(Oilfield Exploration and Development Department,Sinopec,Beijing 100728,China;College of Geology Engineering and Geomatics,Chang’an University,Xi’an,Shaanxi 710064,China;Research Institute of Petroleum Exploration and Development,Sinopec,Beijing 100083,China;Northwest Nonferrous Metals Survey Engineering Co.,Ltd.,Xi’an,Shaanxi 710000,China)

机构地区：[1]中国石油化工股份有限公司油田勘探开发事业部,北京100728 [2]长安大学地质工程与测绘学院,陕西西安710064 [3]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [4]西北有色勘测工程公司,陕西西安710000

出　　处：《西安石油大学学报（自然科学版）》2023年第5期12-19,共8页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金资助项目“致密砂岩储层多边形孔隙结构岩石物理模型研究(42104120)”;陕西省自然科学基金资助项目“群智能优化富有机质页岩岩石物理横波速度预测系统研究及应用(2021JQ-242)”;国家科技重大专项“碎屑岩储层岩石物理建模与地震成像方法研究(2016ZX05002-005-002)”。

摘　　要：结合规则多边形孔隙结构(PSP)模型、自适应(SCA)模型和Gassmann方程,提出基于多边形孔隙结构模型的岩石总孔隙度预测方法。该方法将砂岩中的孔隙等效为由三角形、四边形孔隙和裂缝状孔隙的组合,通过岩心薄片镜下分析统计获得3种孔隙的体积比,由纵波速度和孔隙结构计算岩石的总孔隙度。实验室测量和测井数据试算结果显示该方法预测的砂岩孔隙度精度高于常规方法。在此基础上将该方法应用于地震资料,计算结果与测井资料较为吻合。这些实例证实该方法能有效应用于砂岩储层总孔隙度预测。A prediction method for total porosity of rock based on the polygonal pore structure model is proposed by combining the regular polygonal pore structure(PSP)model,adaptive(SCA)model,and Gassmann equation.This method equates the pores in sandstone to a combination of triangular,quadrilateral and fractured pores.The volume ratios of the three types of pores are obtained through microscopic analysis of core slices,and the total porosity of the rock is determined by longitudinal wave velocity and pore structure.The trial results of laboratory measurement and well logging data show that the accuracy of the sandstone porosity predicted by this method is higher than that of conventional methods.On this basis,the method was applied to seismic data,and the calculation results were in good agreement with logging data.These examples confirm that this method can be effectively applied to predict the total porosity of sandstone reservoirs.

关 键 词：多边形孔隙 PSP模型 SCA模型 砂岩储层 孔隙度预测 

分 类 号：TE122.2[石油与天然气工程—油气勘探] P631[天文地球—地质矿产勘探]